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Extended Reality as a consolidated game platform was always a dream for both final consumers and game producers. If for one side this technology had enchanted and called the attention due its possibilities, for other side many challenges and difficulties had delayed its proliferation and massification. This paper intends to rise and discuss aspects and considerations related to these challenges and solutions. We try to bring the most relevant research topics and try to guess how XR games should look in the near future. We divide the challenges into 7 topics, based on extensive literature reviews: Cybersickness, User Experience, Displays, Rendering, Movements, Body Tracking and External World Information.